Was going to post a long response to this taken I went through the same questions a few months ago when I started getting into this but it seems as if you already got your kit and have made quite a few pretty decent looking jigs! Fun aint it?
Here are a couple of tips from a jig-tying newbie, maybe this will save you some heartache:
Materials: be sure to look for good materials. Google search "how to pick fly tying materials" or "how to pick marabou feathers" etc. A lot of the chain sporting good stores may have some tying material but I've found that the true difference in the looks and feels of the jigs action is in the materials. The cheaper stuff I found doesn't have as much quality to it and I ended up wasting a lot of material based on the basic fact it just wasn't all the greatest stuff for the application. Don't need to go super expensive but I tend to try and shy away from super cheap marabou and hackle. You want feathers with as thin stalks (the center stiff center pieces) so that they wrap around your hook better. Cheaper materials will give you thicker stalks, shorter feather lengths, etc. Also, don't be afraid to look in unconventional places for materials - search fly tying forums for some examples at what crazy stuff people use to tie with. You'd be surprised.
Variations: be sure to look for proper color matches. I'm not saying certain color matches won't work, but it seems that certain color matches work better than others. Try "Googling" AeroJig patterns and other jig patterns to get some inspiration on what you may be able to create, you may even be able to fix up a custom one that just ends up being the best jig you have. You never know. Also looking at pattern concepts will give you ideas as to what types of materials pair well together for the style of lure you are going for. For example, flash colors matching the tail colors, matching the feathers, matching the jig heads etc.
Custom Made Tools: you can spend a TON of money on fly tying tools. I've already learned (partially) the hard way about this and found a wealth of resources online at how to make your own. Not only is it cost effective, I enjoyed greatly making some of these tools. If you don't know the names and what the tools are used for - try looking at YouTube channel done by a dude named "Andy Match". He has a 101 series of lessons where he goes through all the tools and how & what to look for. Check out this link (
http://www.youtube.com/watch?v=5l803fAkumg" onclick="window.open(this.href);return false;) on how to make custom bobbin holders (they'll sell for $5-$8 bucks each - you can make one for under a $1) too - you can never have too many of these as they are incredibly handy when using multiple thread colors (to correspond to multiple material colors and styles and patterns).
Good luck and welcome to the club! :D
“I’m not going to catch any fish in the forest using a steak knife as bait. Still, I’ve got to try.”
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-Jarod Kintz